HackingHealthcareHealthcareDelayed DiscoveryIdentity (basic)LowContained

McKenzie Memorial Hospital

bd_3cb138a829f15ef9 · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 15, 2025

Filed

Jul 24, 2025

To disclose

14 weeks

Affected

Not disclosed

Linked

6 filings

Confidence

65%

Full breach record for McKenzie Memorial Hospital →

McKenzie Memorial Hospital notified consumers of a data breach occurring between April 14-15, 2025. Unauthorized access may have resulted in the exposure of names. The hospital engaged third-party investigators, notified law enforcement, and is offering 12 months of credit monitoring. The incident status is contained.

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Vermont clock✗ VT AG >45 bday14 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 1 days

discovery → filing · 14 weeks / 100 days

Apr 14, 2025

Begins

Apr 15, 2025

Discovered

Jul 24, 2025

Filed

vs. sector median

+5 wks slower

This filing is one of 6 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Nebraska State AGbd_19338d9fd8ccb5b92025-07-24Verified
Massachusetts State AGbd_3c9e3624eb9b32012025-07-24Verified
Maine State AGbd_457ee2e873164bb42025-07-24Verified
HHS OCRbd_4cdd9242a38ba23f2025-07-24Verified

Show 1 more filing ↓

New Hampshire State AGbd_aa5561ddf0b0a58f2025-07-24Verified

Name: McKenzie Health System
norm: mckenzie health system

Name: McKenzie Memorial Hospital
norm: mckenzie memorial hospital
Industry: Healthcarellm

Discovered: Apr 15, 2025
Breach occurred: Apr 14, 2025 – Apr 15, 2025
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Jul 24, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: notified law enforcement

During the incident: Took immediate steps to secure the network and remediate the incident
Notified law enforcement
Engaged third-party specialists to investigate
Conducted a thorough investigation
Took actions to mitigate the risk to the data
Reviewed our policies and procedures related to data protection
Offering you 12 months of complimentary credit monitoring and identity protection services
Changes made: Strengthened our network security
Reviewed our policies and procedures related to data protection to help prevent similar incidents from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(100 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Nebraska State AGJul 24 · first

Massachusetts State AGJul 24 · first

Maine State AGJul 24 · first

HHS OCRJul 24 · first

New Hampshire State AGJul 24 · first

Vermont State AGJul 24 · first · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://ago.vermont.gov/document/2025-07-24-mckenzie-memorial-hospital-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 24, 2025
Raw hash: 5115e7f62385611f27b2bc71c9e8d6c5d4b3243e94e1debccb4d11d3e766dfcd

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityMcKenzie Health System

Victim entityMcKenzie Memorial Hospital

Incidentdiscovered Apr 15, 2025

Stated responseTook immediate steps to secure the network and remediate the incident

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov